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J Appl Biomech. 2014 Mar 5. [Epub ahead of print]

One-Leg Standing Performance and Muscle Activity: Are There Limb Differences.

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  • 1Department of Training and Movement Sciences, Cluster of Excellency in Cognition Sciences, University of Potsdam, Potsdam, Germany.

Abstract

The purpose of this study was to compare static balance performance and muscle activity during one-leg standing on the dominant and non-dominant leg under various sensory conditions with increased levels of task difficulty. Thirty healthy young adults (age: 23 ± 2 years) performed one-leg standing tests for 30 s under three sensory conditions (i.e., eyes open/firm ground; eyes open/foam ground [elastic pad on top of the balance plate]; eyes closed/firm ground). Center of pressure displacements and activity of four lower leg muscles (i.e., m. tibialis anterior [TA], m. soleus [SOL], m. gastrocnemius medialis [GAS], m. peroneus longus [PER]) were analyzed. An increase in sensory task difficulty resulted in deteriorated balance performance (P < .001, effect size [ES] = .57-2.54) and increased muscle activity (P < .001, ES = .50-1.11) for all but two muscles (i.e., GAS, PER). However, regardless of the sensory condition, one-leg standing on the dominant as compared to the non-dominant limb did not produce statistically significant differences in various balance (P > .05, ES = .06-.22) and electromyographic (P > .05, ES = .03-.13) measures. This indicates that the dominant and the non-dominant leg can be used interchangeably during static one-leg balance testing in healthy young adults.

PMID:
24610423
[PubMed - as supplied by publisher]
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